Sole-rounding machine



M rch 8 1927'.

a s. JULIAN v SOLE ROUNDING MACHINE Original Filed JanflO. 1921 Znwnior .Ww W g;

Patented Mar. 8, 1927.

UN ITEB STATES A T E gr p ng GIZDEON JULIAN, 015 BEVERLY, MASSACHUSETTS, ASLEIGNOR UNITED SHOE .MA-

CHINERY COEBPORATION, OF PATERSON, NEW JERSEY, A OOBZPORATION .015 .NEVT

JERSEY.

SOLE-RO'UNIDIN G MACHINE.

Application filed January 10,1921,Seria1 No. 436,050. Renewed January 22, 1923.

The invention relates to that class of sole rounding machines which comprise a pattern, a rounding knife, and means for relatively actuating the knife and pattern to cause the knife to travel about the pattern. In this type of sole rounding machines a knife holder block is usually carried in the end of an arm which is mounted to swing on a knife carrier and is acted on by a spring tending to move the arm towards the pattern to hold the knifein yielding engagement/with thelpatte'rn. During the travel of the knife about the pattern the arm moves in and out --to cause the knife to follow the contour of the pattern. Owing-tothe rapid travel of the *knifeand to the inertia of the comparatively heavy knife arm, which must be overcome by-thespring, the knife is liable to leave the pattern temporarily in passing those points where-there-is an-abrupt change in the outline of the pattern as, for i11- stance, in passing the ball line=of a spade shanksole. To avoid this the present in- Y vention contemplates the provision of a comparatively light auxiliary support for the knifeholder which, during the normal travel of the knife, forms in efiect a rigid part of the knife arm buthas an independent movement toward the pattern whenever the movement of the arm toward the pattern lags as at an abrupt change inthe outline of the pattern. The independent movement of the auxiliary support maybe effected by a quick acting spring which is normally held under tension by 'the comparatively heavy spring of the knife arm and which quickly advances the light auxiliary "support with relation to the knife arm, in casethe arm fails immediately to respond to an "abrupt change in the pattern and thus maintains the knife block in engagement with the pattern until this duty is re-assumed by the'heavier spring of the knife arm,

A preferred "form of the invention is shownin the accompanying drawings embodied in the machine of applicants prior Patent No. 1,092,996, April 14, 1914c. The figure of the drawing is apartial plan view showing so much o'fthemachine as is necessary to illustrate the applicationofthe present invention "thereto.

In the machine shown the pattern 2'is stationary and the knife 4 is caused to travel around the pattern 'by the rotary movement of 'the'table or support 6 'on'which the knife carrier 8 is mounted. .The knife arm 10 is pivoted at 12 on the carrier 8 and is forced in a direction to press the shank-of the knife against the pattern by a main or jprimary spring mounted within the casing 14, as is clearly illustrated and described in the patent above referred to. In embodying the preferred form of the invention in this ma chine a light auxiliary knife-supporting arm "16 is pivoted at18'to the'forward end of the knife arm and is provided at its free end with a bearing'20 in which'the knife holder block 22 isp'ivotally mounted. "The auxiliary arm is arranged to "bear against an abutment 24 at the end oft'he knife'arm and is pressed forward by a comparatively light quick acting auxiliary "spring 26. This spring is normally held under compression by the action of the comparatively heavy spring which forces the knife arm toward the pattern. The independent forward movement of'the auxiliary knife supporting arm '16 is limited by stop surfaces 28 formed on the arm 'l6a11donthe lug upon which the arm is pivoted.

During the normal travel 0f the knife "about the pattern, the coactionof the knife arm 10 and the pattern or,'in other words, thepressure of the'knife againstthe pattern holds theauxiliary arm 16 firmly in engagement with'the abutment 261: on the knife arm so that the auxiliary arm is ineffect-a rigid part of the knife arm. lnpassing a point where the contour of the pattern changes abruptly as, for instance, in passingtheball line of a spade shank sole pattern such as indicated in the drawings, the movement of the knife arm under the influence of its spring may not be quick enough to cause thelrnife to follow the contour of the pattern andin sueh case the auxiliary arm will move quickly forward with relation to the knife arm under the influence of its spring 26 and will cause the knife accurately to follow the pattern.

As the slower acting spring of the knife arm takes effect and moves the arm inward the abutment 24 will again be brought into engagement with the auxiliary arm and thereafter the knife will be held against the pattern by this spring, as in the former constructions. The presence of the auxiliary arm and its quick acting spring do not, therefore, affect the normal action of the knife arm and its spring in causing the knife to follow the contour of the pattern but stand ready to supplement the action of this spring and arm in case there is any tendency of the arm to deviate from its proper path of travel due to its inertia and the rapid travel of the knife about the pattern.

While it is preferred to employ the specific construction and arrangement shown and described in embodying the invention in the a machine of the patent above referred to it will be understood that this construction and arrangement is not essential to the broader features of the invention and may be varied or modifiedas found desirable or best suited to the construction or mode of operation of the machine in which the invention is to be embodied.

What is claimed is:

1. A sole rounding machine having, in combination, a pattern and a knifecarrier relatively movable to cause the knife to travel around the pattern, a spring operated knife arm on thecarrier, a knife holder, and

an auxiliary support for the knife holder mounted for independent movement toward the pattern and normally held rigid with the knife arm by the pressure of the knife against the pattern. I

2. A sole rounding machine having, in combination, a pattern and a knife carrier relatively movable to cause the knife to travel around the pattern, a spring operated knife arm on the carrier, a knife holder, an auxiliary support for the knife holder mounted on .the knife arm, an abutment on the arm normally held against the support by the coaction of said arm and said pattern, and means tending to force the support forward away from the abutment.

3. A sole rounding machine having, in combination, a pattern and a knife carrier relatively movable to cause the lcnife to travel around the pattern, a spring operated knife arm on the carrier, a knife holder, a light auxiliary arm pivoted on the end of the knife arm in which the knife holder is mounted, an abutment on the knife arm againstwhich the auxiliary arm is normally held, and a spring between the arms tending to force the auxiliary arm forward.

4:. A machine for operating on shoe parts,

having,,in combination, an operating tool, a tool holder, a support therefor, means for causing relative movement of the tool holder and the shoe part to cause the tool to operate about the margin of the shoe part, yieldingly operating means tending to force the tool holder towards the work, and an auxiliary support for the tool holder mounted for independent movement towards the work and normally held rigid with thefirst named support by the pressure of the tool against the work.

5. A machine for operating on shoe parts, having, in combination, a tool carrier, an operating tool carried thereby, means for causing relative movement of the tool and the work to cause the tool to operate about the marginof the work, a spring operated tool support on the carrier normally tending to move the tool toward the work, a tool holder,

an auxiliary support for the tool holder piv otally mounted on the tool support, an abut ment on the tool support against which the auxiliary support is held normally by tin pressure of the tool against the work, and a spring tending to force the auxiliary support away from the abutment.

6. A machine for operating on shoe parts, havlng, 1n comblnatlon, a tool carrier, an opcrating tool carried thereby, means for caus- J ing relative movement of the tool carrier and the work to cause the tool to operate about the peripheral portion of the work, a spring-operated tool supporting arm on the carrier, a tool holder, an auxiliary arm carried by the end of the tool carrying arm in which the tool holder is mounted, a spring between the arms tending to force the auxil- 'iary arm towards the work, and an abutment on the tool carrying arm against which the auxiliary arm is normally held in opposition to the force of said spring.

7. A machine for operating on shoe parts, having, in combination, a work support, a table rotatable with respect thereto, a carrier mounted upon the table for pivotal movement with respect thereto, an arm mounted upon said carrier tending normally to move the tool toward the work support, a knife having a pivotal connection with the arm and arranged to operate about the peripheral portion of the work, a pattern arranged to control the path of movement of the knife as it operates about the periphery of the work, and means for moving the knife relatively to said arm to-press the knife against the work and the pattern as the table rotates.

8. A machine for operating on shoe parts having, in combination, a tool carrier, a main'knife supporting arm pivotally mounted on the carrier, an auxiliary knife supporting arm pivotally mounted on the main supporting arm, a knife holding block pivotally mounted on the auxiliary knife supporting arm, a pattern, and means for causing relative movement of the knife and the pattern to cause the knife to operate about the periphery of the pattern.

9. A machine for operating on shoe parts having, in combination, a tool carrier, a pattern, a main tool supporting arm mounted on the carrier, resilient means tending to move themam supportmg arm toward the pattern, an auxillary supporting arm mounted on the mam supporting arm, and resilientaneans tending to move the auxiliary supportlng arm toward the pattern.

GIDEON JULIAN. 

